[1] [1] Pendry J B. Negative refraction makes a perfect lens[J]. Physical Review Letters, 2000, 85: 3966–3969.

[2] [2] Ramakrishna S A, Pendry J B, Schurig D, et al. The asymmetric lossy near-perfect lens[J]. Journal of Modern Optics, 2002, 49(10): 1747–1762.

[3] [3] Fang N, Lee H, Sun Cheng, et al. Sub-diffraction-limited optical imaging with a silver superlens[J]. Science, 2005, 308(5721): 534–537.

[4] [4] Lee H, Xiong Yi, Fang N, et al. Realization of optical superlens imaging below the diffraction limit[J]. New Journal of Physics, 2005, 7: 255.

[5] [5] Zeng Beibei, Yang Xufeng, Wang Changtao, et al. Plasmonic interference nanolithography with a double-layer planar silver lens structure[J]. Optics Express, 2009, 17(19): 16783–16791.

[6] [6] Durant S, Liu Zhaowei, Steele J M, et al. Theory of the transmission properties of an optical far-field superlens for imaging beyond the diffraction limit[J]. Journal of the Optical Society of America B, 2006, 23(11): 2383–2392.

[7] [7] Sun Zhijun, Kim H K. Refractive transmission of light and beam shaping with metallic nano-optic lenses[J]. Applied Physics Letters, 2004, 85(4): 642–644.

[8] [8] Shi Haofei, Wang Changtao, Du Chunlei, et al. Beam manip-ulating by metallic nano-slits with variant widths[J]. Optics Ex-press, 2005, 13(18): 6815–6820.

[9] [9] Verslegers L, Catrysse P B, Yu Zhongfu, et al. Planar lenses based on nanoscale slit arrays in a metallic film[J]. Nano Letters, 2009, 9(1): 235–238.

[10] [10] Xu Ting, Du Cunlei, Wang Changtao, et al. Subwavelength imaging by metallic slab lens with nanoslits[J]. Applied Physics Letters, 2007, 91(20): 201501.

[11] [11] Ronchi V. Giovan Battista Amici’s contribution to the advances of optical microscopy[J]. Physis; Rivista Internazionale di Storia Della Scienza, 1969, 11: 520–533.

[12] [12] Wood R W. The mercury paraboloid as a reflecting telescope[J]. Astrophysical Journal, 1909, 29: 164–176.

[13] [13] Haas W E. Liquid crystal adiSplay research: the first fifteen years[J]. Molecular Crystals and Liquid Crystals, 1983, 94(2): 1–31.

[14] [14] Mao Xiaole, Lin S C S, Lapsley M I, et al. Tunable liquid gradient refractive index (L-GRIN) lens with two degrees of freedom[J]. Lab on a Chip, 2009, 9(14): 2050–2058.

[15] [15] Psaltis D, Quake S R, Yang C. Developing optofluidic tech-nology through the fusion of microfluidics and optics[J]. Nature, 2006, 442(7101): 381–386.

[16] [16] Gay G, Alloschery O, Weiner J, et al. Surface quality and surface waves on subwavelength-structured silver films[J]. Physical Review E, 2007, 75(1): 016612.

[17] [17] Lalanne P, Hugonin J P, Rodier J C. Theory of surface Plasmon generation at nanoslit apertures[J]. Physical Review Letters, 2005, 95(26): 263902.

[18] [18] Xu Ting, Wu Y K, Luo Xiangang, et al. Plasmonic nanoresonators for high-resolution colour filtering and spectral imaging[J]. Nature Communications, 2010, 1(5): 59.

[19] [19] Fu Yongqi, Zhou W, Lim L E N, et al. Plasmonic microzone plate: superfocusing at visible regime[J]. Applied Physics Letters, 2007, 91(6): 061124.

[20] [20] Zhao Yanhui, Lin S C S, Nawaz A A, et al. Beam bending via plasmonic lenses[J]. Optics Express, 2010, 18(22): 23458– 23465.

[21] [21] Xu Ting, Zhao Yanhui, Gan Dachun, et al. Directional excitation of surface plasmons with subwavelength slits[J]. Applied Physics Letters, 2008, 92(10): 101501.

[22] [22] Weber M J. Handbook of Optical Materials[M]. Boston, USA: CRC, 2003.

[23] [23] Gordon R, Brolo A G. Increased cut-off wavelength for a subwavelength hole in a real metal[J]. Optics Express, 2005, 13(6): 1933–1938.

[24] [24] Zeng Beibei, Yang Xuefeng, Wang Changtao, et al. Su-per-resolution imaging at different wavelengths by using a one-dimensional metamaterial structure[J]. Journal of Optics, 2010, 12(3): 035104.

[25] [25] Luo Xiangang, Ishihara T. Surface plasmon resonant inter-ference nanolithography technique[J]. Applied Physics Letters, 2004, 84(23): 4780–4782.

[26] [26] Zeng Beibei, Pan Li, Liu Ling, et al. Improved near field li-thography by surface plasmon resonance in groove-patterned masks[J]. Journal of Optics A: Pure and Applied Optics, 2009, 11(12): 125003.